How do I use the formula editor?

If you need to add mathematical expressions in your question and aren't sure how, read this guide.

TestGorilla's formula editor uses LaTeX input. The good news is you don't need to know LaTeX to create beautiful mathematical expressions. We simplify the process for you!

In the question editor, click the formula icon in the rich text editing bar (highlighted in red in the picture below).

This opens the formula editor (as shown below): 

Here you can enter your mathematical expression. For example, typing...

e=mc^2

... results in the following:

To simplify your formula editing, we've added a few commonly used mathematical expressions. Simply click on one to use it in your formula.

For other expressions, you must use LaTeX codes. The following table should cover most of your needs. It's a good idea to bookmark this page so you can refer back to it as needed.

Description Command   Output
plus or minus
\pm
  pm
multiplication (times)
\times
  times
multiplication (dot)
\cdot
  cdot
division symbol
\div
 
simple text
\text{text}
 
infinity
\infty
 
dots
1,2,3,\ldots
 
dots
1+2+3+\cdots
 
fraction
\frac{a}{b}
 
square root
\sqrt{x}
 
nth root
\sqrt[n]{x}
 
exponentiation
a^b
 
subscript
a_b
 
absolute value
|x|
 
natural log
\ln(x)
 
logarithms
\log_{a}b
 
exponential function
e^x=\exp(x)
 
deg
\deg(f)
 
degree
\degree
 
circle plus
\oplus
 
circle times
\otimes
 
not equal
\ne
 
less than or equal to
\le
 
greater than or equal to
\ge
 
approximately equal to
\approx
 
vector (arrow)
\vec{v}
 
derivative vector
\dot{\vec{v}}
 
vector (bold)
\mathbf{v}
 
unit vector (hat)
\hat{k’}
 
norm
||\vec{v}||
 
element of
\in
 
subset of
\subset
 
subset of
\subseteq
 
contains
\supset
 
contains
\supseteq
 
union
\cup
 
intersection
\cap
 
big union
\bigcup_{n=1}^{10}A_n
 
big intersection
\bigcap_{n=1}^{10}A_n
 
empty set
\emptyset
 
power set
\wp{S}
 
minimum
\min
 
maximum
\max
 
closure
\overline{A}
 
derivative
\frac{df}{dx}
 
derivative
\f'
 
partial derivative
\frac{\partial f}{\partial x}
 
limits
\lim_{x\to \infty}
 
summation
\sum_{n=1}^{\infty}a_n
 
product
\prod_{n=1}^{\infty}a_n
 
integral
\int_{a}^{b}
 
double integral
\iint
 
triple integral
\iiint
 

 

If you need more symbols, you can look them up in this pdf document (there are 14,283 of them in total). Please note that not all of those symbols are available in our editor. If you're missing something, please contact us here.